Endwell, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.2 °F (low) to 57.5 °F (high). Annual precipitation averages 40.6 Inches. Endwell is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.4 °F | 31.9 °F | 2.66 in. |
| February | 16.2 °F | 34.3 °F | 2.13 in. |
| March | 23.1 °F | 42.9 °F | 3.13 in. |
| April | 33.9 °F | 56.5 °F | 3.54 in. |
| May | 45.1 °F | 68.8 °F | 3.43 in. |
| June | 54.3 °F | 77.2 °F | 4.21 in. |
| July | 58.8 °F | 80.8 °F | 4.02 in. |
| August | 57.5 °F | 80.0 °F | 4.11 in. |
| September | 50.4 °F | 72.9 °F | 3.96 in. |
| October | 39.5 °F | 60.4 °F | 3.71 in. |
| November | 30.1 °F | 47.4 °F | 2.82 in. |
| December | 22.5 °F | 37.1 °F | 2.84 in. |
| Annual | 37.2 °F | 57.5 °F | 40.56 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |